CN103091132A - External loading type unpowered atmospheric particulate sampler - Google Patents
External loading type unpowered atmospheric particulate sampler Download PDFInfo
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- CN103091132A CN103091132A CN2013100098217A CN201310009821A CN103091132A CN 103091132 A CN103091132 A CN 103091132A CN 2013100098217 A CN2013100098217 A CN 2013100098217A CN 201310009821 A CN201310009821 A CN 201310009821A CN 103091132 A CN103091132 A CN 103091132A
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Abstract
The invention discloses an external loading type unpowered atmospheric particulate sampler. According to the sampler, a sampling hole is formed in the input end of the sampler, a multi-hole exhaust pipe is arranged at the output end of the sampler, and a particulate cutter is arranged on an air flow channel between the sampling hole and the multi-hole exhaust pipe. The external loading type unpowered atmospheric particulate sampler further comprises a differential pressure sensor, a main controller, an electric valve and an empennage regulating element, wherein the electric valve is arranged on the multi-hole exhaust pipe, the empennage regulating element is arranged at the output end of the sampler, and the main controller is connected with the differential pressure sensor through leads. The external loading type unpowered atmospheric particulate sampler is mounted on an aircraft. According to the sampler, a power device does not need to be configured, the atmospheric particulate sampling is realized by using power generated by external air flow, a difference value between air pressures at the input end and the output end of the sampler is detected by the differential pressure sensor in real time, and the electric valve and the empennage regulating element are intelligently regulated according to the difference value between the air pressures by the controller so as to keep a flow rate of sampling air constant, thus realizing constant-speed sampling.
Description
Technical field
The present invention relates to a kind of atmosphere environment supervision instrument, relate in particular to a kind of outer formula Unpowered atmosphere particulates sampling thief that carries.
Background technology
Particle sampler is the visual plant of carrying out air quality monitoring, is mainly used in gathering airborne suspended particulate substance, provides data analysis basic for obtaining airborne suspended particulate substance content.Its principle of work of impact sampler is: be beneficial to aspiration pump an air-breathing power is provided, make air flow into sampling thief with certain speed, because the momentum that varying in size of particle diameter has is different, when the aerosol particle thing passes through cutter along with air stream, the particle of large particle diameter is delayed on the collecting board of cutter, the particle of small particle diameter is driven by air stream and walks around collecting board arrival filter membrane and gathered, and therefore reaches the purpose of separating the different-grain diameter particle.
Environmental monitoring need to obtain the content of more accurate particulate in air, when gathering particulate in air, needs to keep the constant of sample gas flow velocity, to obtain sampled air amount accurately.But due to the impact of many factors, the resistance in cutter can change, thereby makes the flow velocity respective change of air-flow.Existing particle sampler all is equipped with the power-equipments such as corresponding air pump or blower fan mostly, keeps the constant flow rate of sampling thief air-flow by the rotating speed that changes motor.
Sampling apparatus itself causes that the principal element of fluctuations in discharge is the variation of sampling membrane resistance, and along with the sample size of gathering on filter membrane increases, resistance increases, if do not add control, the sample gas flow will reduce.At present, air sampler adopts metering hole (pipe) to control sampling flow more, its principle is, artificial series connection metering hole in the main gas circuit of sampling, increase very large resistance, its numerical value can make the fluctuations in discharge that causes due to the filter membrane change in resistance be in allowed band much larger than filter membrane change in resistance value like this.But the power consumption of this method is larger, most of energy is used for overcoming the metering hole resistance, the aspiration pump pressure head that needs is higher, multiplex in the low discharge sampling thief, and for middle flow or large traffic sampling device, because becoming progression, sampling quantity in the unit interval rises, altering a great deal of filter membrane resistance, if continue to adopt the metering hole method, just very high to the requirement of motor, power waste is very serious, and directly affects the serviceable life of motor.
At present, particle sampling is controlled the motor speed of air pump or blower fan mostly by flow controller, to realize keeping the purpose of constant flow.Self all is equipped with power-equipment traditional particle sampler, although stable power source can be provided, the assurance sample rate is constant, but can not effectively utilize the power of air-flow itself, the air pump equal power device has also consumed the resistance that more power comes balanced sample device self when particle sampling power is provided.
Summary of the invention
The purpose of the embodiment of the present invention is to propose a kind of outer formula Unpowered atmosphere particulates sampling thief that carries, self need not to configure propulsion system, the power that utilizes extraneous air-flow to produce, intelligence are regulated the air pressure difference at sampling thief input port and output port place to keep constant, realize isokinetic sampling's purpose.
To achieve these goals, the present invention adopts following technical scheme:
The outer formula Unpowered atmosphere particulates sampling thief that carries, input end at sampling thief is provided with thief hatch, output terminal is provided with the porous gas outlet, be provided with cutter for particles on gas channel between thief hatch and porous gas outlet, the described outer formula Unpowered atmosphere particulates sampling thief that carries also comprises sample gas flow rate detection mechanism and sample gas flow adjustment mechanism; Described sample gas flow rate detection mechanism, inside is provided with the differential pressure pickup for detection of sampling thief input end and output air pressure difference; Described sample gas flow adjustment mechanism, inside is provided with master controller, be arranged on the empennage that motorized valve on described porous gas outlet and sampling thief output arrange regulates parts, master controller, be connected with described differential pressure pickup by wire, and according to the air pressure difference that described differential pressure pickup collects, regulate described motorized valve and empennage and regulate parts maintenance sample gas constant flow rate; The described outer formula Unpowered atmosphere particulates sampling thief that carries is arranged on aircraft.
Preferably, described differential pressure pickup is connected respectively on the input end and output terminal of described sampling thief by conduit, and the air pressure value of the input end of Real-time Collection sampling thief and output.
Preferably, be provided with mounting bracket on the shell of described sampling thief, the described outer formula Unpowered atmosphere particulates sampling thief that carries is arranged on aircraft.
Preferably, the flying speed of described aircraft is 20～60m/s, and isokinetic sampling's flow is 30～92L/min.
Preferably, the described outer formula Unpowered atmosphere particulates sampling thief that carries also includes the Temperature Humidity Sensor that ambient temperature and humidity is carried out Real-Time Monitoring, and this Temperature Humidity Sensor is connected with described primary controller.
Preferably, described master controller is realized data transmission by serial communication interface and far-end computer.
Advantage of the present invention is:
the outer year formula Unpowered atmosphere particulates sampling thief that the present invention addresses, self need not to configure power-equipment, following aircraft moves ahead, the pressure that utilizes extraneous air-flow to produce, realize the Atmospheric particulates sampling, by utilizing differential pressure pickup, the air pressure value of Real-time Collection sampling thief input end and output, and calculate thus the air pressure difference of input end and output, then this air pressure difference information is passed to master controller, master controller, regulate parts according to variation regulating electric valve and the empennage of pressure difference signal, to realize the control to porous gas outlet and empennage, before and after the assurance sampling thief, air pressure difference is constant, and then the isokinetic sampling who realizes outer year formula Unpowered atmosphere particulates sampling thief.
Description of drawings
Fig. 1 is the structural representation that the embodiment of the present invention is carried formula Unpowered atmosphere particulates sampling thief at home and abroad;
Fig. 2 is the theory diagram that Fig. 1 carries formula Unpowered atmosphere particulates sampling thief at home and abroad.
Embodiment
In conjunction with Fig. 1, shown in Figure 2, the outer formula Unpowered atmosphere particulates sampling thief that carries, input end at sampling thief is provided with thief hatch 1, output terminal is provided with porous gas outlet 3, be provided with cutter for particles 2 on gas channel between thief hatch and porous gas outlet, the outer formula Unpowered atmosphere particulates sampling thief that carries is fixedly mounted on aircraft by the mounting bracket 10 that arranges on the sampling thief shell.The outer formula Unpowered atmosphere particulates sampling thief that carries, also be provided with differential pressure pickup 6, master controller 7, motorized valve 4 and empennage adjusting parts 5, wherein, differential pressure pickup, be connected respectively to by conduit 8,11 on the input end and output terminal of sampling thief, be used for the input end of Real-time Collection sampling thief and the air pressure value of output, and then detect the air pressure difference of sampling thief input end and output, preferably, conduit 8,11 is communicated with the thief hatch 1 of input end, the porous gas outlet 3 of output respectively.Motorized valve, be arranged on the porous gas outlet, be used for regulating drag size, empennage is regulated parts, be arranged on the output terminal of sampling thief, master controller is connected with described differential pressure pickup by wire 9, and according to the air pressure difference information that described differential pressure pickup collects, regulate described motorized valve and empennage regulate parts keep sampling thief before and after air pressure difference constant.
Preferably, the flying speed of aircraft is 20～60m/s, and isokinetic sampling's flow is 30～92L/min.The outer formula Unpowered atmosphere particulates sampling thief that carries can reach sample effect preferably under this speed; Certainly, carry formula Unpowered atmosphere particulates sampling thief outward and also be not restricted to be arranged on aircraft, also can be arranged on the land vehicles such as automobile.
Preferably, carry formula Unpowered atmosphere particulates sampling thief outward, also include the Temperature Humidity Sensor that ambient temperature and humidity is carried out Real-Time Monitoring, this Temperature Humidity Sensor is connected with described primary controller.The setting of Temperature Humidity Sensor makes the outer formula Unpowered atmosphere particulates sampling thief that carries can take into full account particle sampling situation under different humiture environment, has increased the accuracy of sampled result.
When the work of formula Unpowered atmosphere particulates sampling thief is carried in the present invention at home and abroad, follow pushing ahead of aircraft, on the one hand, the dynamic pressure of air-flow itself makes between sampling thief input end and output terminal and to form pressure reduction and force gas to enter thief hatch, on the other hand, and when air-flow is tided over the empennage of expansion, gas velocity increases, and then in the certain draft of empennage rear portion generation, impel the atmosphere that contains particle to enter thief hatch, then discharge through cutter for particles, porous vent port successively.In sampling process, cutter for particles is collected the particle in atmosphere, gathering along with particle, resistance increases gradually, causes the input end of sampling thief and output terminal pressure reduction to become large, and is delivered on master controller by differential pressure pickup, master controller is regulated parts according to variation regulating electric valve and the empennage of pressure reduction, to realize the adjusting to porous gas outlet and empennage, before and after the assurance sampling thief, pressure reduction is constant, and then makes sampling thief can carry out the isokinetic sampling.The present invention can realize the particle sampling of multiple particle diameter by changing cutter for particles.
In the present invention, master controller 7 is except the flow velocity that can control in real time sampling thief, flow, also possess the functions such as ambient temperature and humidity Real-Time Monitoring, sampling time control, real-time sampling data recording, realize data transmission by the serial communication interfaces such as RS232 and far-end computer.
Certainly; above explanation is only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this instructions; alternative, obvious form of distortion that all that make are equal within all dropping on the essential scope of this instructions, ought to be subject to protection of the present invention.
Claims (6)
1. carry formula Unpowered atmosphere particulates sampling thief outward, input end at sampling thief is provided with thief hatch, output terminal is provided with the porous gas outlet, be provided with cutter for particles on gas channel between thief hatch and porous gas outlet, it is characterized in that, the described outer formula Unpowered atmosphere particulates sampling thief that carries also comprises sample gas flow rate detection mechanism and sample gas flow adjustment mechanism; Described sample gas flow rate detection mechanism, inside is provided with the differential pressure pickup for detection of sampling thief input end and output air pressure difference; Described sample gas flow adjustment mechanism, inside is provided with master controller, be arranged on the empennage that motorized valve on described porous gas outlet and sampling thief output arrange regulates parts, master controller, be connected with described differential pressure pickup by wire, and according to the air pressure difference that described differential pressure pickup collects, regulate described motorized valve and empennage and regulate parts maintenance sample gas constant flow rate; The described outer formula Unpowered atmosphere particulates sampling thief that carries is arranged on aircraft.
2. the outer formula Unpowered atmosphere particulates sampling thief that carries according to claim 1, it is characterized in that, described differential pressure pickup is connected respectively on the input end and output terminal of described sampling thief by conduit, and the air pressure value of the input end of Real-time Collection sampling thief and output.
3. the outer formula Unpowered atmosphere particulates sampling thief that carries according to claim 1, is characterized in that, is provided with mounting bracket on the shell of described sampling thief, and the described outer formula Unpowered atmosphere particulates sampling thief that carries is arranged on aircraft.
4. the outer formula Unpowered atmosphere particulates sampling thief that carries according to claim 1, is characterized in that, the flying speed of described aircraft is 20～60m/s, and isokinetic sampling's flow is 30～92L/min.
5. the described outer formula Unpowered atmosphere particulates sampling thief that carries of according to claim 1 to 4 any one, it is characterized in that, the described outer formula Unpowered atmosphere particulates sampling thief that carries, also include the Temperature Humidity Sensor that ambient temperature and humidity is carried out Real-Time Monitoring, this Temperature Humidity Sensor is connected with described primary controller.
6. the outer formula Unpowered atmosphere particulates sampling thief that carries according to claim 5, is characterized in that, described master controller is realized data transmission by serial communication interface and far-end computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310009821.7A CN103091132B (en) | 2013-01-11 | 2013-01-11 | Outer year formula Unpowered atmosphere particulates sampling thief |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310009821.7A CN103091132B (en) | 2013-01-11 | 2013-01-11 | Outer year formula Unpowered atmosphere particulates sampling thief |
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| CN103091132A true CN103091132A (en) | 2013-05-08 |
| CN103091132B CN103091132B (en) | 2015-08-05 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407650A (en) * | 2014-11-03 | 2015-03-11 | 上海力申科学仪器有限公司 | Multi-airflow monitoring device applied to bio-safety cabinet |
| CN105486549A (en) * | 2016-01-20 | 2016-04-13 | 四川大学 | Sampling system capable of realizing constant-flow isokinetic sampling |
| CN105865852A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院城市环境研究所 | Vectored flow sampler |
| CN106323828A (en) * | 2015-06-29 | 2017-01-11 | 上海仪器仪表研究所 | Environment sampling and monitoring system and method based on fine particles |
| CN106895998A (en) * | 2015-12-21 | 2017-06-27 | 北京同方洁净技术有限公司 | Atmosphere sampler |
| CN107238559A (en) * | 2016-03-29 | 2017-10-10 | 上海北分科技股份有限公司 | A kind of constant speed flue gas sampling detection device |
| CN108369163A (en) * | 2015-09-22 | 2018-08-03 | 汉阳大学校Erica产学协力团 | particle sampling probe and fine dust measuring device using the same |
| CN111813136A (en) * | 2020-07-02 | 2020-10-23 | 中国人民解放军国防科技大学 | Method for quickly forming extinction type bioaerosol at preset height |
| US10845347B2 (en) | 2015-09-22 | 2020-11-24 | Industry-University Cooperation Foundation Hanyang University Erica Campus | Particle sampling probe and fine dust measuring device using same |
| CN112525624A (en) * | 2020-11-25 | 2021-03-19 | 江苏农林职业技术学院 | Particle capture device based on unmanned aerial vehicle flight platform |
| CN113447322A (en) * | 2021-05-20 | 2021-09-28 | 西北核技术研究所 | Low-energy-consumption aerosol sampling device on aircraft, particularly rotor wing unmanned aerial vehicle, and aircraft |
| CN114563232A (en) * | 2022-02-17 | 2022-05-31 | 江苏盈泰检测科技有限公司 | Atmospheric pollutant determination and sampling system and determination and sampling method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153403B (en) * | 2016-08-05 | 2019-07-23 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | A kind of Atmospheric particulates sampling system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407650A (en) * | 2014-11-03 | 2015-03-11 | 上海力申科学仪器有限公司 | Multi-airflow monitoring device applied to bio-safety cabinet |
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| US10845347B2 (en) | 2015-09-22 | 2020-11-24 | Industry-University Cooperation Foundation Hanyang University Erica Campus | Particle sampling probe and fine dust measuring device using same |
| CN108369163A (en) * | 2015-09-22 | 2018-08-03 | 汉阳大学校Erica产学协力团 | particle sampling probe and fine dust measuring device using the same |
| CN106895998A (en) * | 2015-12-21 | 2017-06-27 | 北京同方洁净技术有限公司 | Atmosphere sampler |
| CN105486549B (en) * | 2016-01-20 | 2018-08-03 | 四川大学 | A kind of sampling system that can realize constant flow isokinetic sampling |
| CN105486549A (en) * | 2016-01-20 | 2016-04-13 | 四川大学 | Sampling system capable of realizing constant-flow isokinetic sampling |
| CN107238559A (en) * | 2016-03-29 | 2017-10-10 | 上海北分科技股份有限公司 | A kind of constant speed flue gas sampling detection device |
| CN105865852A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院城市环境研究所 | Vectored flow sampler |
| CN111813136A (en) * | 2020-07-02 | 2020-10-23 | 中国人民解放军国防科技大学 | Method for quickly forming extinction type bioaerosol at preset height |
| CN112525624A (en) * | 2020-11-25 | 2021-03-19 | 江苏农林职业技术学院 | Particle capture device based on unmanned aerial vehicle flight platform |
| CN113447322A (en) * | 2021-05-20 | 2021-09-28 | 西北核技术研究所 | Low-energy-consumption aerosol sampling device on aircraft, particularly rotor wing unmanned aerial vehicle, and aircraft |
| CN114563232A (en) * | 2022-02-17 | 2022-05-31 | 江苏盈泰检测科技有限公司 | Atmospheric pollutant determination and sampling system and determination and sampling method |
| CN114563232B (en) * | 2022-02-17 | 2024-04-12 | 江西志科检测技术有限公司 | Atmospheric pollutant measuring and sampling system and measuring and sampling method |
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| CN103091132B (en) | 2015-08-05 |
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